Question: Fraction of formula too long with typesetting level : Extended

I have a small problem with the display of fraction and x_dot at the same time. 


This the exemple :

compactdisplay = flase;
Settings(typesetprime = false);
Settings(typesetdot = true);

diff(1/2*LongExpression*x(t), t);

The Results 

when I choose the typesetting level : Extended. I got this result :

And when I choose the typesetting level : Maple Standrad. I got this result 

What I  want to have is mix of both, it mean like this 

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